To increase the traffic of your website first you need to server unique and useful content to the user. The content should be created in such a way that the user will themselves share the content with their friends and this goes on and on. This is the only way you can increase your traffic very rapidly.
If "content is king", then providing your visitors with valuable pieces of information that they can benefit from would do the trick.
Also, consider social media presence - use Facebook, Twitter, LinkedIn and any other community at your disposal to exhibit your website, in a polite manner.
Integrating your site with social media platforms also works well. Because your followers constantly visit your site through automated updates on Facebook, Twitter, etc.